AT&T 7200 series, 7500 series, 7100 series manual Data Protection, Data Privacy, Data Restriction

DATA CONNECTIVITY — AN OVERVIEW 7-11

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Note that BRI terminals follow the asynchronous user interface specification, which means that the terminals are always in the command mode by default. This implies that whenever a call is to be placed, the user must always dial "d<CR>" at the very least. Since the concept of hot lines means that all a user need do is go off-hook to place a call, there is really no such thing as a true hot line for BRI terminals. Instead, the keystroke sequence described would result in dialing the hot line number.

Data Protection

This DIMENSION, System 85, and Generic 2 feature protects data calls from intrusions by any of the system bridge-on features (for example, Call Waiting, Override, Busy Verification).

Data Protection is provided in two forms:

∙Data Protection — Temporary lets user activate Data Protection on a per-call basis by entering a dial access code. This feature is active by default on the System 85 and Generic 2 communications systems.

∙Data Protection — Permanent is assigned through system administration to lines and trunks used primarily for data calls.

Data Privacy

This System 75 and Generic 1 feature protects analog data calls from being disturbed by any of the switch’s signaling or ringing features. With Data Privacy, the switch cannot access the protected call or superimpose any tones onto it. This feature is equivalent to the Data Protection — Temporary feature on the DIMENSION, System 85, and Generic 2 because it is invoked on a per-call basis through a dial access code that the user enters when placing the call.

Data Restriction

This System 75 and Generic 1 feature protects analog data calls from being distrubed by any of the switch’s signaling or ringing features. With Data Restriction, the switch cannot access the protected call or superimpose any tones onto it. This feature is equivalent to the Data Protection — Permanent feature on the DIMENSION, System 85, and Generic 2 because it is assigned to a line or trunk through system administration.

Data Only Off-Premises Extension

This feature lets on-premises users establish data calls to remote DTEs or DCEs over digital or analog facilities. Operation of this feature is transparent to all users. Through the feature, any on-premises terminal can access a remote data endpoint as though it were on-premises, as long as the local and remote DCEs are compatible. Some possible configurations are shown in figure 7-5.